Introduction:

Answer to Problem 1TYR
Correct answer:
Micturition occurs when the detrusor contracts. Therefore, option a is correct.
Explanation of Solution
Justify reasons for the correct statement:
When the bladder is getting filled with the urine, it is essential for the urethral sphincters to be closed and the detrusor to relax. This occurs by the sympathetic pathways, which is originating from the upper lumbar spinal cord. The process of micturition is also called as “voiding”. The act of micturition can be controlled by micturition reflex.
Option (a) is given as, “detrusor”.
The bladder is filled with the urine when the detrusor get relaxed. But, the contraction of the sphincters occurs in order to ensure retention of the urine (in bladder) until the volunteer make null.
Hence, option (a) is correct.
Justify reasons for the incorrect statements:
Option (b) is given as, “internal urethral sphincter”.
In men, the neck of the bladder and urethra is encircled by a smooth muscle. The sympathetic nervous system is abundantly innervated and gets thickened into a collar of muscle, which is called as the internal urethral sphincter. During ejaculation, it prevents the reflux of semen into the bladder. Hence, it is a wrong answer.
Option (c) is given as, “external urethral sphincter”.
An external urethral sphincter is present in both sexes. It is of skeletal muscle that surrounds the urethra where it moves through the pelvic floor. The voluntary control (voiding of urine) is delivered by the external urethral sphincter. Hence, it is a wrong answer.
Option (d) is given as, “muscularis of the ureter”.
It is one of the three layers of the ureter. The draining of the urine from the renal pelvis to the bladder is achieved by a peristaltic wave, which is initiated by the muscularis of the ureter. Hence, it is a wrong answer.
Option (e) is given as, “all of the above”.
The micturition occurs when the detrusor contracts. Hence, it is a wrong answer.
Hence, options (b), (c), (d), and (e) are incorrect.
Micturition happens when parasympathetic stimulates detrusor to contract.
Want to see more full solutions like this?
Chapter 23 Solutions
ANATOMY PHYSIOLOGY CUSTOM COMBO
- Describe the principle of homeostasis.arrow_forwardExplain how the hormones of the glands listed below travel around the body to target organs and tissues : Pituitary gland Hypothalamus Thyroid Parathyroid Adrenal Pineal Pancreas(islets of langerhans) Gonads (testes and ovaries) Placentaarrow_forwardWhat are the functions of the hormones produced in the glands listed below: Pituitary gland Hypothalamus Thyroid Parathyroid Adrenal Pineal Pancreas(islets of langerhans) Gonads (testes and ovaries) Placentaarrow_forward
- Describe the hormones produced in the glands listed below: Pituitary gland Hypothalamus Thyroid Parathyroid Adrenal Pineal Pancreas(islets of langerhans) Gonads (testes and ovaries) Placentaarrow_forwardPlease help me calculate drug dosage from the following information: Patient weight: 35 pounds, so 15.9 kilograms (got this by dividing 35 pounds by 2.2 kilograms) Drug dose: 0.05mg/kg Drug concentration: 2mg/mLarrow_forwardA 25-year-old woman presents to the emergency department with a 2-day history of fever, chills, severe headache, and confusion. She recently returned from a trip to sub-Saharan Africa, where she did not take malaria prophylaxis. On examination, she is febrile (39.8°C/103.6°F) and hypotensive. Laboratory studies reveal hemoglobin of 8.0 g/dL, platelet count of 50,000/μL, and evidence of hemoglobinuria. A peripheral blood smear shows ring forms and banana-shaped gametocytes. Which of the following Plasmodium species is most likely responsible for her severe symptoms? A. Plasmodium vivax B. Plasmodium ovale C. Plasmodium malariae D. Plasmodium falciparumarrow_forward
- please fill in missing parts , thank youarrow_forwardplease draw in the answers, thank youarrow_forwarda. On this first grid, assume that the DNA and RNA templates are read left to right. DNA DNA mRNA codon tRNA anticodon polypeptide _strand strand C с A T G A U G C A TRP b. Now do this AGAIN assuming that the DNA and RNA templates are read right to left. DNA DNA strand strand C mRNA codon tRNA anticodon polypeptide 0 A T G A U G с A TRParrow_forward
- Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningEssentials of Pharmacology for Health ProfessionsNursingISBN:9781305441620Author:WOODROWPublisher:Cengage


