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Advocard [28]
3 years ago
11

A dichotomouys key is used to identify a plant. 1a. Leaves are spiny ......................Pinus taeda 1b. Leaves are broad.....

................ Go to 2 2a. Single leaf..........................Go to 3 2b. Many leaves....................... Go to 4 3a. Leaf edge is smooth..............Cornus florida 3b. Lead edge is rough...............Ulmus americana 4a. Leaflet edges are smooth........Albizia julibrissin 4b. Leaflet edges are rough.........Juglans nigra A plant has many broad leaves with rough edges. What type of plant is this? (1 point)
albizia julibrissin
pinus taeda
cornus florida
juglans nigra
Biology
1 answer:
just olya [345]3 years ago
7 0

Answer:

juglans nigra

Explanation:

I did my research and its correct I finished the quiz

1 B

2 C

3 D

4 C

5 A

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increasing intracellular cAMP leads to smooth muscle relaxation by: Group of answer choices inhibiting IP3 channels, leading to
kirza4 [7]

Answer:

1. Inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction.  

2. Increasing the relative activity of MLCP, leading to a decrease in tension.

3. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry.

Explanation

In smooth muscle, cyclic AMP (cAMP) mediates relaxation because cAMP inhibits a specific kinase required for myosin light chain protein (MLCP) phosphorylation, thereby triggering contraction in the smooth muscles. It has been shown that cAMP inhibits 1,4,5-trisphosphate (IP3)-dependent calcium ions (Ca 2+) release by activation of the cGMP-dependent protein kinase (PKG). PKG proteins act to modulate Ca2+ oscillations by stimulating sarcoplasmic Ca2+-ATPase membrane proteins, increasing Ca2+ in the sarcoplasmic reticulum stores and Ca2+ efflux from the cells, and activate voltage-gated potassium (K) channels, thereby leading to membrane hyperpolarization and reducing Ca2+ entry through Ca2+ channels.

6 0
3 years ago
which of the following is part of the digestive system? Adrenal gland, Ovary, Striped muscle, or tounge.
KIM [24]

Answer:

tongue

Explanation:

Oh boy, what is this. So striped muscle isn't guaranteed to be part of the digestive system, and the adrenal gland just doesn't sound like it would be part of the digestive system. The Ovary is a hard no, to the tongue is the only one left.

if this is wrong let me know

hope this helps:)

6 0
3 years ago
A scientific model doesnt need to be something physical. It can also be a mathmatical____
Naddika [18.5K]
I would go with mathmatical formula because of physics and what not but I'm not completely sure so if you have a different possible answer you think would be better, go with that :)
7 0
4 years ago
Read 2 more answers
GUYS HELP ASAP!!!
kvasek [131]
It is b or the second answer choice shown
5 0
3 years ago
The glial cells responsible for maintaining the blood-brain barrier are the
nika2105 [10]

Answer:

The correct answer is option A, that is, astrocytes.

Explanation:

Glial cells or the glia refers to the non-neuronal cells in the CNS and the PNS that maintain homeostasis produces myelin, and offer protection and support for neurons. The most prominent type of glial cells in the CNS are astrocytes.  

The astrocytes exhibit various projections, which connect neurons with their blood supply and at the same time maintaining the blood-brain barrier.  

6 0
3 years ago
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