Human Health — Cumulative exam Answers

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Which organelle can be compared to a security guard who decides whom may enter a building and whom may not?

A
cell membrane
B
cytoplasm
C
endoplasmic reticulum
D
mitochondrion
2
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Dichotomous keys are constructed based on

A
combinations of characteristics in unknown organisms.
B
combinations of characteristics in known organisms.
C
genetic sequences in known organisms.
D
genetic sequences in unknown organisms.
3

Which component of the cardiovascular system allows the body to function by supplying the cells with oxygen?

A
red blood cells
B
white blood cells
C
platelets
D
plasma
4

What scientific knowledge about macromolecules is a direct result of Gerardus Johnannes Mulder’s 1838 discovery?

A
All proteins contain carbon, hydrogen, oxygen, and nitrogen.
B
All carbohydrates contain carbon, hydrogen, and oxygen.
C
Nucleic acids are polymers with nucleotide monomers.
D
The helical structure of DNA is essential for protein production.
5

Consider the brains of species A and species B to scale. Species A Species BSuppose that species A and species B have the same body size. Knowing this information, what can be determined from the pictures?

Question illustration
A
Species B is more intelligent and has a better memory than species A.
B
Species B can process sensory information more quickly than species A.
C
Species A is able to rationalize thoughts more effectively than species B.
D
Species A's brain is smaller for its body size than the brain of species B.
6

Many schools require applicants to take a test, such as the SAT or the ACT, as part of the admissions process. These tests determine students’ knowledge in the subject areas of reading, writing, math, and science. They consist of a variety of question types, including multiple choice, short answer, and essay. Which part of the central nervous system helps students remember the correct answers to the questions on these exams?

A
hypothalamus
B
hippocampus
C
cerebellum
D
brain stem
7

Staphylococcus aureus, or staph, is a bacteria that is commonly found in the nose and on the skin of humans. While it is typically not harmful to humans, it is sometimes able to enter the body through an injury or broken skin, and get into the bloodstream. When this happens, it can cause a serious infection called sepsis. Sepsis can cause an individual to go into shock and bodily organs to stop functioning. Symptoms of sepsis include inflammation, fever or hypothermia, increased heart rate, and rapid breathing.Which immune system component initially results in the inflammation and responds quickly when Staphylococcus aureus enters the bloodstream?

Question illustration
A
complement system
B
phagocytes
C
Langerhans cells
D
B lymphocytes
8

What would most likely happen to plants if they did not have a waxy outer coating?

A
They would store more water in their leaves.
B
They would photosynthesize at a faster rate.
C
They would store more sugars in their leaves.
D
They would be harmed by insects and UV radiation.
9

The table lists some organelles and functions. Only one pair is correctly matched.Functions of OrganellesOrganelleFunctionNucleusDirects cell activityEndoplasmic reticulumBreaks down sugar molecules to supply energyGolgi apparatusSupports and protects organelles in the cellLysosomeProduces proteins for the cellWhich organelle in the table is correctly matched with its function?

A
nucleus
B
endoplasmic reticulum
C
Golgi apparatus
D
lysosome
10

Which of the following can combine in a cell to convert a lower-energy molecule into a higher-energy molecule?

A
ADP + P + energy
B
ATP + P + energy
C
ADP + P
D
ATP + P
11

Which best describes stem cells?

A
Differentiation produces specialized cells from stem cells.
B
Self-renewal produces specialized cells from differentiated cells.
C
Self-renewal produces differentiated cells from stem cells.
D
Differentiation produces stem cells from specialized cells.
12

Which actions are involved in the immune response?

A
regulating hormonal and autonomous responses
B
identifying and destroying harmful substances
C
increasing and supporting the ability of red blood cells to carry oxygen
D
regulating and adjusting the skin's secretion of sweat and oil
13

How does ATP supply energy for cellular activities?

A
by breaking off a phosphate group from its structure
B
by releasing the sugar molecule from its structure
C
by adding a phosphate group to its structure
D
by attaching itself to a glucose molecule
14

It can be seen on a cladogram that modern birds and reptiles share a common ancestor. Select the piece of evidence that best supports this idea.

A
Reptiles are also related to mammals.
B
Birds have evolved into many groups.
C
Feathers are a derived characteristic that first evolved in reptiles.
D
Birds have the derived characteristic of being warm blooded, like mammals.
15

Which represents the cross between parent plants if one is heterozygous and has yellow-colored pods and the other is homozygous and has green-colored pods?

A
Yy ´ yy
B
YY ´ yy
C
Yy ´ Yy
D
yy ´ yy
16

Which part of the neuron below is indicated by the arrow, and what is its function?

Question illustration
A
The myelin sheath releases neurotransmitters so that electrical impulses can be transferred.
B
The myelin sheath protects and transmits electrical impulses faster.
C
The node of Ranvier transmits electrical impulses faster.
D
The node of Ranvier transfers information across a gap.
17

In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

A
Trilobites existed before jellyfish and ammonites.
B
Jellyfish existed before trilobites and ammonites.
C
Ammonites existed before trilobites and jellyfish.
D
Jellyfish, trilobites, and ammonites lived together.
18

Which kingdom(s) include both unicellular and multicellular organisms?

A
Plantae and Archaebacteria
B
Fungi
C
Eubacteria
D
Animalia and Plantae
19

Mendel was able to study seven traits in all the pea plants in each generation. Which of his hypotheses allowed him to analyze each trait separately?

A
If two different alleles for a gene occur together, one of the alleles may be expressed while the other is hidden.
B
When gametes are formed, each gamete carries only one allele for the gene.
C
There are alternate versions of a alleles called genes.
D
For each inherited trait, there is only one copy of the gene that codes for that trait.
20

Why is an angioplasty an incorrect treatment for an aneurysm?

A
Aneurysms cannot be treated.
B
An angioplasty may rupture the blood vessel wall.
C
An angioplasty can have dangerous drug reactions.
D
Aneurysms are treated only with pacemakers.

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