Question

human kidneys are located
on each side of the esophagus
around the level of the waist
at the base of the brain
in the chest cavity
question 9
1 pts
the hormone that directly increases water reabsorption by the kidneys is adh
true
false
question 10
1 pts
voluntary control of the urination reflex is provided by the:
external urethral sphincter
spinal cord
internal urethral sphincter
detrusor muscle

Explanation:

• Question 9: Antidiuretic hormone (ADH), also known as vasopressin, acts on the kidneys' collecting ducts. It increases the permeability of these ducts to water, allowing more water to be reabsorbed from the filtrate back into the bloodstream. This reduces urine volume and concentrates the urine. So, the statement "The hormone that directly increases water reabsorption by the kidneys is ADH" is correct.
• Question 10: The external urethral sphincter is composed of skeletal muscle. Skeletal muscle is under voluntary control (unlike smooth muscle, which is not under direct voluntary control). The internal urethral sphincter is made of smooth muscle (involuntary), the spinal cord is part of the central nervous system that can be involved in reflexes (but not the voluntary part of urination control in this context), and the detrusor muscle is smooth muscle in the bladder wall (involuntary contraction for emptying the bladder). So, voluntary control of the urination reflex is provided by the external urethral sphincter.

Answer:

• Question 9: True
• Question 10: external urethral sphincter