What happens when the diaphragm contracts? a. the volume of the thoracic cavity increases. b. the diaphragm rises. c. the volume of the thoracic cavity decreases. d. the rib cage moves down.

How would the amount of oxygen in the circulatory system be different in a athlete who is blood doping, compared to a normal athlete?

Select the phrase that best describes po2 at the arterial ends of the pulmonary capillaries. the po2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries.

What is the primary nutrient needed by plants

A gray wolf's sperm contains 393939 chromosomes. He mates with a female gray wolf. How many chromosomes will there be in the resulting zygote?

What do oestrogen and progesterone do in the menstrual cycle

Melting snow ponds and water found in rolls are examples of

Do bears have any other Behavioral Adaptations other than hibernation.

Enhancer i can stimulate the transcription of gene a, but the insulator blocks its effect on gene b. enhancer ii can stimulate the transcription of gene b, but the insulator blocks its effect on gene a.

Anna heated 15 g of Substance A to obtain 5 g of substance B, 4 g of Substance C, and a certain amount of Substance D, which statement is correct A) the mass of substance D was 10g less than the mass of substance A B) the mass of substance D was 1 g

A source from which organisms generally take elements is called a/an A. biotic community. B. exchange pool. C. reservoir. D. food web.