Top answers

How do muscles contract and how is this controlled?

Skeletal muscle is composed of myofibrils. The myofibrils contain repeating units called sarcomeres. This also called the operational units. The sarcomeres contain actin filaments and myosin filaments. The a...
EK
Answered by Erika K. • Biology tutor
5274 Views

Why is the left ventricle thicker than the right ventricle?

The right ventricle only pumps blood to the lungs, which are very near the heart. The left ventricle needs to pump blood to the eintire body, so the greater distance requires higher pressure to make sure the...
MS
Answered by Marie S. • Biology tutor
22663 Views

Describe the process of photosynthesis and name three factors that may limit the rate of photosynthesis.

The overall equation for photosynthesis: Light energy Carbon dioxide + water -----> oxygen + glucose During the process of photosynthesis, carbon dioxide from the air and water from the soil is converted ...
AG
Answered by Amy G. • Biology tutor
34770 Views

Explain what is meant by the term phenotype?

Expression of a genotype due to interaction with the environment
LP
Answered by Laura P. • Biology tutor
4123 Views

How do the different organelles in a eukaryotic cell work together to produce a hormone such as insulin?

Hormones are proteins. Each specific protein is made up of a specific sequence of amino acids. DNA in the nucleus codes for the specific sequence. This DNA is transcribed into mRNA which leaves the nucleus t...
SH
7988 Views