Friday
April 18, 2014

Homework Help: Science URGENT~

Posted by Gabby on Thursday, April 11, 2013 at 9:57pm.

1.
Your ____ is your first line of defense against pathogens. (1 point)

brain
heart
large intestine
skin

2.
Blood vessels help regulate your body's temperature. When it's cold, your blood vessels ____ to decrease blood flow and retain heat. (1 point)

boil
constrict
cool down
expand

3.
The ____ muscle contracts about 70 times per minute. (1 point)

cardiac
skeletal
smooth
none of the above

4.
Red blood cells are produced in _____ in the bone. (1 point)

cartilage
periosteum
red marrow
yellow marrow

5.
The skeletal system has several functions including _______. (1 point)

protecting the body from bacteria
moving limbs
producing blood cells
sending messages to the brain

6.
Reflex responses are controlled in your _____, which allows your body to respond without _________. (1 point)

brain; hesitation
muscles; moving
receptors; delay
spinal cord; thinking

7.
Olfactory cells located in your nasal passages link your sense of ________ with your sense of ________. (1 point)

hearing; smell
smell; taste
touch; taste
vision; hearing

8.
A(n) ________ moves from one neuron to another by crossing a small space called a _______. (1 point)

impulse; synapse
axon; dendrite
signal; receptor
synapse; sensory gap

9.
Which of the following describes a motor neuron? (1 point)

a neuron that carries an impulse to the brain/spinal cord from a stimulus
a neuron that carries an impulse through the brain/spinal cord
a neuron that carries an impulse from the brain/spinal cord to a muscle
a neuron that helps carry an impulse across a synapse

10.
The ________ system of the peripheral nervous system would have control over ___________. (1 point)

somatic; impulses
autonomic; heart rate
central; salivary glands
somatic; digestion

My Answers:
1)D
2)B
3)A
4)C
5)B
6)A
7)B
8)D
9)??? idk
10)??? idk

ok so are 1-8 correct... and could you help with 9 & 10 plz thx

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