1. Thirst is detected and controlled by the ______________.
A. Limbic system
B. Hindbrain
C. Midbrain
D. Hypothalamus
2. Stenohaline osmoconformers such as sea anemones and sea stars
A. Can tolerate a wide range of osmotic changes in their marine environment.
B. Have limited tolerance to changes in salinity of the surrounding sea water.
C. Are adapted to live in marine and fresh water habitats.
D. Use methylamines and amino acids in ECF to maintain osmotic balance.
3. Animals living in intertidal zones are
A. Strict osmoconformers.
B. Hypo-ionic osmoconformers
C. Euryhaline
D. Stenohaline
4. pH of arterial blood is slightly higher than that of venous blood because
A. Arterial blood has more hydrogen ions
B. Arterial blood has less acidic metabolites such as carbon dioxide and lactic acid
C. Venous blood has less carbon dioxide
D. Arterial blood always has more oxygen
5. During acidosis, the renal tubules:
A. Secrete more hydrogen ions into the filtrate
B. Filter out more bicarbonate ions form blood into the filtrate
C. Reabsorb very little bicarbonate ions from the filtrate
D. All of these