DAT Booster Biology Practice Exam 9
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Mucous cells secrete
mucous which serves to protect the lining of the stomach from the highly acidic juices of the stomach.
Parietal cells secrete
hydrochloric acid, which denatures proteins and kills bacteria.
Chief cells secrete
pepsinogen and gastric lipase
G cells secrete t
hormone gastrin.
gastrin stimulates
parietal cells to secrete hydrochloric acid which activates the pepsinogen to pepsin Pepsin then digests proteins found in food.
goblet cells
found within the small intestine where they secrete mucous as a protective layer.
Which of the following structure of a bird embryo is used to store uric acid and is later used for gas exchange?
allantois
Which of the following is dominated by the gametophyte generation?
mosses
bryophytes
non-vascular plants true mosses dominated by gametophyte
tracheophytes
vascular plants dominated by the sporophyte phase
bryophytes examples
mosses liverworts hornworts
lycophyta
club mosses, spoke mosses, quillworts
pterophyta
ferns and horsetails
coniferophyta
conifers
anthophyta
flowering plants
Which one of the following features are found in all members of Class Mammalia?
diaphragm
High blood pressure is a condition in which the long-term force of the blood against your artery walls is high enough that it may cause health problems. Which of the following can counteract high blood pressure?
decreased aldosterone
Blood pressure can be thoroughly regulated via the
kidneys
aldosterone,
released from the adrenal cortex released in response to low filtrate sodium levels, and its effects include increased sodium reabsorption. causes water to osmotically re-enter renal blood vessels and increase blood pressure. Therefore, high blood pressure can be rectified by decreasing aldosterone release.
Which of the following structures produce epinephrine?
adrenal medulla
adrenal medulla, the inner layer of the adrenal gland, is responsible for the production of
catecholamines including epinephrine and norepinephrine (also known as adrenaline and noradrenaline).
catecholamines are involved in the
“fight or flight” response.
A zoologist travels to different biome communities, keeping track of how many members of different species she encounters. For example, in a forest community, she notes that there are 50 bears, 20 squirrels, and 10 beavers so she writes Forest: 50, 20, 10. She does this for several more biomes. Which biome community demonstrates the most species diversity?
Desert: 20, 20, 20, 20, 20 Biological diversity or biodiversity describes both the richness and evenness of a community. The richness of a community describes the number of different species present without regard for their population count. The evenness of a community describes the relative population size of each species in a community. For example, consider a community with 1000 species A and 2000 species B, and another community with 1500 species A and 1500 species B. The two communities have the same richness because they both have 2 different species. However, the second community exhibits greater evenness because both species are present in 50% abundance in contrast to the 33% and 66% distribution found in the first community.