In: Anatomy and Physiology
1)
When antidiuretic hormone levels are low, ________________.
A. |
a small volume of concentrated urine is excreted |
|
B. |
most of the water reaching the collecting ducts is not reabsorbed |
|
C. |
nearly all of the filtered water is reabsorbed |
|
D. |
sodium solute concentrations will be low |
|
E. |
aquaporins are inserted into the collecting duct cell membranes |
2)
Select the correct order of structures a mature sperm will travel through during ejaculation.
1. Spongy urethra 2. Ductus deferens 3. Ejaculatory duct 4. Prostatic urethra
A. |
2,3,4,1 |
|
B. |
3,1,4,2 |
|
C. |
3,2,4,1 |
|
D. |
1,2,3,4 |
|
E. |
2,3,1,4 |
3)
During swallowing:
A. |
the soft palate elevates during the buccal phase |
|
B. |
a bolus of food is formed during the pharyngeal-esophageal phase |
|
C. |
the upper esophageal sphincter relaxes in the pharyngeal-esophageal phase |
|
D. |
the epiglottis closes over the larynx during the buccal phase |
|
E. |
the buccal phase ends when food enters the esophagus |
Answer:(b) most of the water reaching the collecting duct is not reabsorbed.
Reason:
Main function of antidiuretic hormone is water reabsorption,when antidiuretic hormone level gets low,there is Decrease in the reabsorption of water in kidney and water get excreted from the body and lead to dehydration and thirst occurs.antidiuretic hormone reabsorb water via the insertion of aquaporins.
Answer:(a)2,3,4,1.
Reason:
Answer:soft palate elevates during buccal phase.
Reason:
Buccal phase is called oral phase, voluntary phase