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Fed [463]
3 years ago
6

In the cell membrane, the molecules which move large molecules into and

Biology
1 answer:
Bess [88]3 years ago
8 0

Answer:

ENDOCYTOSIS AND EXOCYTOSIS: MOVEMENT OF LARGE PARTICLES

Explanation:

It is possible for large molecules to enter a cell by a process called endocytosis, where a small piece of the cell membrane wraps around the particle and is brought into the cell. If the particle is solid, endocytosis is also called phagocytos.

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A demonstration is performed during a lecture on muscle
scZoUnD [109]

Answer:

The answer is D

Number of motor units recruited

Explanation:

The force a muscle generates is dependent on the length of the muscle and its velocity which is shortened.

A motor unit is the grouping of muscle fibers supplying nerves by the neuron and consists of the motor neuron.

The number of muscle fibers within a motor unit varies, and is a function of the muscle’s ability for accurate and refined motion.

Precision can be determined to be inversely proportional to the size of the motor unit. As a result, small motor units can exercise greater precision of movement compared to larger motor units. For example, thigh muscles which are responsible for large powerful movements, can have a thousand fibers in each unit, while eye muscles which requires small precise movements, might only have about ten.

Groups of motor units are supplied with nerves to coordinate contraction of a whole muscle and generate appropriate movement; all of the motor units within a muscle are referred to as a motor pool.

As a result, the number of motor units with are recruited will facilitate the maximum amount of tension that allows the student keep his arm extended in place under the  increasing weight of the books.

6 0
3 years ago
Suppose a species of bird called the red‑crested warbler has a plumage length that is controlled by a single gene. The P????mPlm
andreev551 [17]

Answer:

Check the explanation

Explanation:

North American:

112 birds total => 224 alleles

112 - 55 birds = 57 short plume birds.

q^2= (2*57) / 224 = 0.5089

Freq(short plume allele) = q = 0.7134

Freq(long plume allele) = p = 1 - q = 0.2866

From this North American population we get

0.2866 * 224 = 64 long plume alleles

0.7134 * 224 = 160 short plume alleles

South American:

452 birds total => 904 alleles

452 - 75 birds = 377 short plume birds.

q^2 = (2*377) / 904 = 0.8341

Freq(short plume allele) = q = 0.9133

Freq(long plume allele) = p = 1 - q = 0.0867

From this South American population we get

0.0867 * 904 = 78 long plume alleles

0.9133 * 904 = 826 short plume alleles

Blended population has

64 + 78 = 142 long plume alleles

160 + 826 = 986 short plume alleles

142 + 986 = 1128 total alleles

p = 142/1128 = 0.1259

q = 986/1128 = 0.8741

All right. The new population has the p and q from the blended population. The new population has 1000 individuals. The portion of long plumed will be homozygote long plumage + heterozygote, which is p^2 + 2pq, and you multiply that by the population size 1000 to get the final answer.

population size * (p^2 + 2pq) = 1000 * (0.1259^2 + 2*0.1259*0.8741) = 236 birds

4 0
3 years ago
what is the relationship between epicenter distance and difference in arrival times between P and S-waves?
Luden [163]

Answer:

yaeh

Explanation:

As the P and S waves travel out from an earthquake the P waves get progressively farther ahead of the S waves. Therefore, the farther a seismic recording station is from the earthquake epicenter the greater will be the difference in time of arrival between the P and S wave.

3 0
3 years ago
Which statement is correct?
katovenus [111]

Answer:

D.

Explanation:

The number of neutrons always equals the number of electrons.

6 0
3 years ago
The ..... is located at the back of the brain
Rama09 [41]

Answer:

occipital lobes

Explanation:

Located at the back of the brain, the occipital lobes are the part of it responsible for sight. They are part of the cerebral cortex. The temporal lobes and the parietal lobe also play a role in visual perception.

7 0
3 years ago
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