Your optometrist shines a light in your eye and notices your pupil constricts (becomes smaller) in response to the light. She tells you the iris (the colored part of the eye) is a muscle that adjusts the size of the pupil automatically in response to the amount of light entering the eye. Based on this information, which type of muscle do you think forms the iris? a. skeletal b. cardiac c. smooth d. visual

Q: When you exit a dark room into a brightly lit environment, within seconds, you to see a crisp view…

A: The ability of our eyes to adapt to low light and high light situations is due to the presence of…

Q: The region is the “front” of the knee.a. patellarb. poplitealc. pesd. inguinal

A: A bone is an unbending organ that comprises part of the vertebrate skeleton in creatures. Bones…

Q: Which statements are correct about Balance a. Static balance evaluates the position of the head…

A: Ear serves as a transducer, it converts sound energy to mechanical energy which acts as nerve…

Q: Eliza complained of double vision and went to see her optometrist. The optometrist tested the…

A: The eye is one of the most complex paired sensory organs of the visual system. It helps in the…

Q: Which of the following statements explains why vision is less sharp in dim light than in bright…

A: A photoreceptor cell is a particular type of neuroepithelial cell found in the eye capable of visual…

Q: Which of the following sites contains striated muscle that is not under voluntary control? A.…

A: A soft tissue that found in both animals and humans is called muscle.  It is made up of actim and…

Q: What is the first and most direct energy source for muscle con￾traction? a. glucose b. ATP c.…

A: Answer- The muscle contraction is the crutial step in the movement and locomotion.

Q: Which statement best summarizes why muscles often work in pairs

A: A tissue that is soft and is found in most of the animal’s skeletal system is known as muscle.…

Q: ) While you note improvement in the clinic when doing drills with the biofeedback, it seems she is…

A: The gluteal muscles of the hips consist of the gluteus Maximus, gluteus medius and gluteus minimus.…

Q: What region of the retina contains a high density of photoreceptor cells and allows for extremely…

A: The fovea centralis of the retina contains high-density photoreceptor cells and allows for extremely…

Q: Why is it easier to see images at night using peripheral, rather than the central, vision? a. Cones…

A: It is easier to see images at night using peripheral rather than central vision because at the edges…

Q: Movement of a limb in two directions requires a pair of muscles becausea. a single muscle can only…

A: Bones are the rigid, living tissue that forms the main component of the skeletal system. The bones,…

Q: he area between two Z discs is termed a A. A band B. I band C. H zone D. Sarcomere

A: The muscle fibre contain sarcomere which is the constructional unit and contain thick and thin…

Q: The type of muscle used to move the leg when walking isa. skeletal.b. cardiac.c. smooth.d. All of…

A: A group of cells having a similar structure, function, and origin is called tissue. Muscles are the…

Q: Contraction of a muscle usually puts more tension on a structure, but contraction of the ciliary…

A: Ciliary muscle present in the eye is a smooth muscle and mesodermal in origin and is responsible for…

Q: passing to the visual receptors of the eye?   a.cornea b.iris c.aqueous humor

A: Out of the five senses, vision is the most used one. The vision is possible through the eye.The…

Q: 1. muscle contraction Skeletal muscle contraction is initiated by _______________________ motor…

A: When there is an activation in the tension generating sites in the muscle fibers then it is known as…

Q: Rod and cone coupling is communication between rods and cones via A. Glutamate receptors B. Gap…

A: Rods are responsible for vision at low light levels . Cones are active at higher light level, are…

Q: since the age of 10, you have used glasses for myopia. You have heard about the new types of surgery…

A: Myopia is a condition that is characterized by the difficulty in viewing farther objects while the…

Q: what statements are false about Balance a. Static balance evaluates the position of the head…

A: Balance consists of two types of equilibrium that is static equilibrium and dynamic equilibrium.…

Q: Check all that you know are true about the abductor pollicis longus muscle based on its name.   A.…

A: The human skeleton comprises of about bones and cartilages that serves as the major framework of the…

Q: The ossicles:   a. directly connect the tympanic membrane with the tectorial membrane   b.…

A: Ear is considered as one of the most important sense organs in living organisms; which helps the…

Q: The transduction process of converting light into neural signals sent to the central nervous system…

A: Introduction The neural systems known as senses allow an organism to control its behaviours by…

Q: The muscle that regulates how much light enters the eye is called thea. conjunction.b. iris.c.…

A: The eyes are the organs that provide sight to the individual. It includes a large number of…

Q: You are testing your patient's extraocular muscles.  What will be the correct combination of right…

A: The extra ocular muscles of the eye are located in the orbit of eye and are extrinsic muscles. They…

Q: Which type of sensory receptor enables you to feel the position ofyour legs, even if a table hides…

A: D-  Proprioceptor

Q: Why do healthcare professionals divide the body into different planes and regions? A. In medicine, a…

A: In the study of anatomy, correct knowledge of the body planes and symmetry are very important. It is…

Q: Name the part of the eye that(a) determines the colour of a person’s eye(b) Controls the amount of…

A: The eye is an organ, which detects light and sends signals along the optic nerve to the brain. It is…

Q: An experimental drug blocks the body’s muscle spindles from detecting stretch. Predict the effects…

A: Muscle spindles are defined as the stretch receptors within a muscle's body that sense differences…

Q: As people age, they often develop the need for reading glasses What is this condition called? a.…

A: Eye is an organ of sight. It possesses the ability of accommodation. Accommodation is a process by…

Q: A patient comes to your clinic reporting knee pain when running. You ask questions about when it…

A: Motor control is the study movements and postures and the underlying mechnism. Psychology and…

Q: When an ophthalmologist surgically corrects a patient’s vision through LASIK or PRK, the doctor is…

A: Eye- The eye is used for seeing different objects. The lens in the eye is present just behind the…

Q: If “adductor” is part of the name of a muscle, what does that tell you about the muscle? a. It is a…

A: Hip adductors. The hip adductors are a group of five muscles located in the medial compartment of…

Q: Which is not an action of a muscle? activate push pull O a. O b. O c. O d. contract

A: Muscle action means the muscle movement. This includes both contracting and relaxing.The  muscle…

Q: Choose the INCORRECT statement below: a. The nose if superior to the chin b. The ears are lateral…

A: A human standing, facing up, feet together and pointing forward, with none of the long bones crossed…

Q: If someone is born with dense cataracts on both eyes, and the cataracts are removed years later,…

A: The lens inside your eye has a clouding which is termed a cataract.Just behind the iris, the lens…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.