The clinical definition of the hematocrit refers to the percentage of
A. erythrocytes in the blood.
B. plasma in the blood.
C. platelets in the blood.
D. all formed elements in the blood.
E. leukocytes in the blood.
Answer: A
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At the end of 8 weeks, why is the conceptus considered a fetus?
A. All the primary germ layers are formed. B. The neural tube and yolk sac have formed. C. All of the organ systems are present. D. The mesoderm has formed. E. The amniotic cavity has formed.
A patient has presented with an abnormal reflex response. In response to a flash of light, the patient will move his eyes towards the light but not turn his head. Which of the following may explain the condition?
A. The patient has damage to his trochlear nerve (IV), accentuating his ability to move his eyes and rendering the need to move the head unnecessary. B. The patient has damage to the oculomotor nerve (III), affecting his ability to coordinate eye movement and head movement. C. The patient has damage to the accessory nerve (XI), affecting his ability to reflexively turn his head. D. The patient has damage to the occipital lobe of the cerebrum, causing him to be blind to the flash of light.
A typical ejaculation results in the discharge of 2 to 5 mL of the fluid called ________.
A. sperm cells B. seminal vesicle secretions C. mucus D. prostatic secretions E. semen
If an individual carries two different alleles for the same trait, the individual is ________ for the trait
A) homologous B) homozygous C) heterozygous D) autosomal E) polygenic