Question 56 When are the semilunar valves closing? when the atrioventricular valves are closed when the ventricles are contracting O when the atria are relaxing when the ventricles are relaxing

Q: Which of the folowing immune cells recognize antigens and activate additional immune cells? O Plasma...

A: Introduction: The Lymphoreticular system comprises structural cells (reticulum cells, fibroblast, an...

Q: Which heart valve(s) is/are open during the Ejection phase of the cardiac cycle?   A. Tricuspid B. A...

A: The cardiovascular system of the body is concerned with the circulation of blood rich in oxygen to d...

Q: Define carpal

A:  A bone could be a rigid tissue that constitutes a part of the vertebrate skeleton in animals. Bones...

Q: Define tentorium cerebelli

A: The brain is the important part of the central nervous system. It includes the cerebrum, cerebellum,...

Q: Which of the following hormone(s) are produced by the hypothalamus? Choose al Follicle stimulating h...

A: Hormones are the chemical messengers that are secreted by the endocrine glands directly into our blo...

Q: During pregnancy, FSH and LH levels should be: CHigh progesterone stimulates the recicase of FSH and...

A: Hormones Play a Significant Role in  Pregnancy. Infertility, there are two significant hormones: lut...

Q: Define epiphyseal plate

A: Bones make up the skeletal system of the body providing structure and protection to the organs. Bone...

Q: How do organisms get O2 to their cells?

A: Introduction: Blood vessels are the part of the body's circulatory system that delivers the blood to...

Q: Define sinus venosus

A: The sinus venosus is a cardiac chamber, which is quadrangular in shape and located below the posteri...

Q: Describe the events that cause inhalation and exhalation.

A: The relationship between gas pressure and volume aids in the understanding of breathing mechanics. B...

Q: Which protein is not part of the thin filament in a muscle fiber?   A. Actin B. Myosin  C. Tropomyos...

A:   Muscles are the organs that form the body’s muscular system it comprises three forms of muscle tis...

Q: Re-uptake results in:     excitement of the neighboring neurons.     more neurotransmitt...

A: Synapses are chemical messengers responsible for transmission of signals from a nerve cell (presynap...

Q: What types of stimuli excite pain receptors?

A: Receptors are proteins, typically cell surface receptors, that bind to ligands and cause responses w...

Q: How does the bipotential gonads form into ovaries? O Through expression of the 5RY gene ) Secretion ...

A: During the time of embryo development, bipotential gonads can either get differentiated into male go...

Q: Define plasma

A: Blood is a fluid connective tissue that is red in color and performs vital pick up and delivery serv...

Q: Layer A is called _____X________, and ______Y________ develops from this layer. Select one: a. ...

A: Layer A is called ectoderm and nervous system develops from this layer .

Q: The function of bile salts is toa. act as detergents.b. calm digestion.c. stimulate the gallbladder....

A: Bile salts are found in bile juice, a secretion produced by liver cells to aid digestion. The consti...

Q: A B C D Hypothalamus Pituitary glands Ovaries Uterus Hormonal Nervous Dilation Placent...

A: In the brain, the hormone oxytocin serves as a chemical messenger which plays an essential role in s...

Q: Summarize the activities that generate and propagate anaction potential.

A: ACTION POTENTIAL : an action potential is caused by either threshold or suprathreshold stimuli upon ...

Q: Define membranous urethra

A:  The male epithelial duct may be a slender fibromuscular tube that conducts water and bodily fluid f...

Q: Which of the following hormone(s) are produced by the hypothalamus? Choose all that apply. Follicle ...

A: Hormones are the chemical messengers that are secreted by the endocrine glands directly into our blo...

Q: Define mons pubis

A: Introduction: The pubic symphysis is a secondary cartilaginous joint situated near the midline of th...

Q: What are the heart’s upper and lower chambers called?

A: Heart is responsible for circulation of blood in the body. Blood helps in the transportation of oxyg...

Q: Define autolysis

A: The history for the lengthiest survived cell is the white blood cells. 5% are still alive after 70 h...

Q: Define diabetes insipidus

A: Blood examinations show unusual levels of many electrolytes, including an elevated level of sodium, ...

Q: Explain the mechanism of blood clot with emphasize on the roles of glycoconjugates.

A: The coagulation of the blood and the immune system goes hand in hand. Blood clots formed during coag...

Q:

A:    Pulmonary function test is a diagnostic method to test the proper functioning of the lungs. Breat...

Q: Two antagonistic hormones (meaning they work in opposition to each other) are Select one: a. insul...

A: Hormones are defined as the type of body's chemical messengers where they are produced by the glands...

Q: Which of the following rows describes the change in heart rate, blood flow to skin, and glucose stor...

A: The parasympathetic neural system is usually called housekeeper system because it promotes all inter...

Q: Which of the following statements is true?   A. Some individuals are born with Rh antibodies. B. A p...

A: Rh stands for Rhesus factor. It is responsible for determining the characteristics of a red blood ce...

Q: The release of insulin from the pancreas is directly regulated by Select one: a. an increase in bl...

A: Insulin and glucagon are two hormones secreted by the pancreatic cells to regulate the blood sugar l...

Q: Information from static vestibular receptors goes directly to the motor cortex Araetice back muscles...

A: Information from static vestibular receptors goes directly to the BRAIN STEM CORTEX . The vestibular...

Q: Define chemoreceptor

A: The receptors can be defined as the proteins which get bound with the ligands to result in an immuno...

Q: An individual of normal weight suffering from blood glucose imbalance had his urine sample analyzed ...

A: Insulin is a peptide hormone discharged by beta cells in the pancreatic islets and is supposed to be...

Q: Which property of water makes it effective at maintaining the homeostasis of the internal body tempe...

A: Water occurs in three different forms, these are called solid (ice), liquid (liquid water), and gase...

Q: An inhibitory post synaptic potential is a membrane potential that:   A. Is slightly depoloarized fr...

A: Membrane potential can be defined as the type of potential gradient which is present across the cell...

Q: Define each of the respiratory volumes and capacities.

A: The lungs are the organs used for the exchange of gases between the body and the atmosphere. the lun...

Q: Which of the following allows the cell to recover from hyperpolarization during an action potential?...

A: The transmission of signals across the different regions of the body occurs in the form of electrica...

Q: Why is it important that the alcohol used in the DNA extraction is kept cold? Helps to precipitate t...

A: DNA is the deoxyribonucleic acid that is formed of the nucleotides which are formed of deoxyribose s...

Q: Define meniscus; pl. menisci

A: The skeletal system provides a structural framework to the human body along with the muscular system...

Q: . Name the extraembryonic membrane that gives rise toeach of the following: umbilical blood vessels,...

A: Embryology is the study of the development and growth of fertilized eggs (zygote) into a mature embr...

Q: Histological description of the different types of blood vessels. Explain each in long explanation

A: Blood vessels are conduits that distribute blood throughout the body tissues. Blood vessels form 2 c...

Q: Define tricuspid valve

A: Introduction: The heart consists of four chambers: two atria and two ventricles.Blood passes through...

Q: Define ossification

A: The human skeleton originally includes greatly of cartilage which is fairly soft and is gradually tr...

Q: Define human immunodeficiency virus (HIV)

A: Diseases whose prevalence in human beings are continuously increased or threaten to rise shortly are...

Q: compares the structural features of cortex and medulla in the kidney. (e.g color, location, features...

A: Kidneys are major organs of the body. They are components of the excretory or the urinary system. Th...

Q: What ion is found in high concentration inside the cell relative to outside of the cell?   A. Sodium...

A: A cell can be defined as the smallest unit of the living organisms which formed the groups to perfor...

Q: Nonalcoholic fatty liver causes

A: There are no obvious signs in many cases of NAFLD. When there are signs, which normally include fati...

Q: Give the anatomic basis for the phenomenon known as “goose flesh”

A: Goose flesh is an involuntary phenomenon in which hairs of the body become erect and fleet. This occ...

Q: Which is true about male hormones? OLH stimulates the Leydig cell to produce testosterone. O Leydig ...

A:    In male human reproductive system, testes produce sperms and sex hormones and store sperms. Major...