1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
agasfer [191]
3 years ago
11

Please help, I need it fast!!!

Biology
1 answer:
mezya [45]3 years ago
8 0

Answer:

Question 1

B

Question 2

A

Question 3

i don't know this answer, sorry

Question 4

C

You might be interested in
Growth and repair involve primarily what type of reactions?1. catabolic2. It depends on which body or cell part is growing or re
Rus_ich [418]

Answer:

Anabolic.

Explanation:

The metabolic reactions of the body are important to maintain the physiology and homeostasis of the body. Two main types of reaction in the body are catabolic reactions and anabolic reactions.

The anabolic reaction is the reactions that are involved in the formation of the large molecules from the simpler substances. The anabolic reactions are involved in the growth and repair process as complex protein and factors are required that can only be obtained by the anabolic reactions.

Thus, the correct answer is option (3).

4 0
3 years ago
Which of the following chemicals opens us binding sites allowing muscle filaments to connect to each other? Select one:
HACTEHA [7]

Answer:

The correct answer will be option-D.

Explanation:

Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.

Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.

This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.

Thus, option-D is the correct answer.

3 0
3 years ago
A Chlorella cell viewed through a microscope is 0.00005 m wide when the magnification is 2000.
juin [17]

Answer:

0.0025micrometer.

Explanation:

To calculate the actual size of the image, the formula to be used is

Actual size=Image size÷magnification.

The image size is 0.00005 wide

Magnification is 2000

First, convert the image size to micrometer.

=0.00005 × 1000000

50micrometers.

Actual size= 50÷2000

Actual size = 0.0025

3 0
3 years ago
_________________ are central nervous system depressants, and they produce loss of sensation, stupor, and unconsciousness. Selec
Snezhnost [94]

Answer:

Anesthetic drugs

Explanation:

Anesthetic drugs serve to block the pain and other somatic sensations by inactivating the central nervous system. For example, procaine is used to block the pain sensation in the skin during the suturing of a gash or during dental work. These drugs target the voltage-gated Na+ channels and do not allow them to open. As a result, action potentials cannot propagate and pain signals do not reach the CNS. Some of these drugs also lower the speed of propagation of action potential.

6 0
3 years ago
Which coefficients should be used to balance the following synthesis reaction? ___ Li + ___ S → ___ Li2S
drek231 [11]
2 Li + 1 S → 1 <span>Li2S is the synthesized reaction.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the electrical charge on the plate that causes the beam to bend toward the plate
    6·2 answers
  • After DNA fragments with matching sticky ends are temporarily joined by complementary base pairing, the union can be made perman
    9·1 answer
  • Genes a, b, and c are known to be in that linear order in an organism. A testcross is done that yields 20 double crossover proge
    5·1 answer
  • A friend tosses a ball to you. Which action does your body take first to catch
    6·2 answers
  • A continental rift is a zone where
    9·2 answers
  • explain how scientists can know if the wolves are having a negative or positive impact at yellowstone.
    12·1 answer
  • A template strand of DNA in a gene reads:
    11·1 answer
  • Match each stem or root to its description.<br>Plz help meeee<br>WILL MARK BRANLYIEST ​
    5·2 answers
  • In manipulative studies, it is necessary to have an experimental group and a ________ group.
    10·1 answer
  • When is the kinetic energy of a pendulum the least?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!