Which hormone is released in times of stress and causes increased blood flow to the heart and lungs as well as higher blood pressure?
A. vasopressin
B. epinephrine
C. testosterone
D. parathyroid
E. calcitonin
Answer: B
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A fish detects vibrations in the water by means of its _________, which contains numerous ____________.
A. lateral line; hair cells B. ear; statocysts C. swim bladder; stretch receptors D. skin; mechanoreceptors E. lateral line; thermoreceptors
An adult patient has just received a diagnosis of brain cancer and is undergoing treatment. Based on what you know about cell division and cancer, why does this seem unusual?
What will be an ideal response?
You discover a gene that results in a complete lack of hair in rats, and you name the gene "chromedome." A cross of homozygous normal and homozygous bald rats results in all bald rats. You conclude that the baldness allele is dominant, but when you repeat the cross with different rats none of the offspring are bald. Extremely puzzled you study your records and discover that in the first cross the bald rat was female, while in the second cross the bald rat was male. What do you conclude from this information?
A. chromedome is imprinted in males. B. chromedome is dominant in females and recessive in males. C. chromedome is dominant in males and recessive in females. D. chromedome is an X-linked gene. E. chromedome is imprinted in females.
The term "brain dead" may refer to the fact that all brain centers have ceased to function except the:
A) cerebellum. B) hypothalamus. C) medulla oblongata. D) cerebrum. E) thalamus.