Relation Functions and Coordination Systems
Introduction
Relation functions are the result of joint action and coordination systems that ensure survival. Sensory receptors capture stimuli from the internal and external environment, allowing for the development of effective responses for survival. Coordination systems comprise the nervous system and the hormonal or endocrine system, which work together to control body functions, ensuring that the systems of the agencies act coordinately. Both systems form a single system: the neuroendocrine
Read MoreHuman Sensory and Nervous Systems: Anatomy and Physiology
Repectores sensory 1. The taste:
the taste receptor cells are housed in the taste buds of the tongue.
Papillae: filiform:
Punteagudo are so distinguished in any language. Mushroom:
mushroom and is in the tip and sides.
Califorme:
its shape resembles in calyx, is pispone V-shaped and is located at the top of the tongue.
Olfaction:
the sense of smell is in the nose, there is q and chemoreceptors.
Functions:
perception olores.El man is able to discriminate between 2 and 4 thousand odors.
Structure:
Read MoreKingdom Monera: Characteristics, Classification, and Evolution
Kingdom Monera
Overview
Kingdom Monera, now considered obsolete by most experts, was once a fundamental part of the classification of living things. It encompassed prokaryotes, including bacteria and cyanobacteria, and was widely used in textbooks and manuals. This kingdom comprised thousands of species inhabiting diverse environments.
History of Monera
The term “Monera” has a long history, with its meaning evolving over time. Ernst Haeckel first used the term in 1866 as part of his phylogenetic tree
Read MoreGenetics Problems and Exercises
Qualitative and Quantitative Traits
Problem 1
Statement: The phenotypic expression of qualitative features can be changed only by a mutation causing VF.
Answer: True
Problem 2
Statement: The phenotypic variation in a population for a qualitative trait is continuous. VF
Answer: False
Genotype-Environment Interaction and Hybrids
Problem 3
Statement: The genotype-environment interaction is not very specific, so it is easy to make euphenic changes. VF
Answer: False
Problem 4
Statement: Hybrid individuals are homozygous.
Read MoreIntroduction to Cell Biology and Genetics: Exercises and Solutions
EXERCISES: Biological Variability and Characters
Exercise 1
What is cytokinesis?
Solution
The distribution of cytoplasm between two daughter cells and separation of two cells.
Exercise 2
Enter the name order of the four phases of mitosis.
Solution
Four phases: prophase, metaphase, anaphase, and telophase.
Exercise 3
Identify the stage that each of the following descriptions refers to:
- Disappearance of chromosomes and chromatin appearance.
- Duplication of genetic material.
- Union of chromosomes to mitotic spindle.
Proteins: Structure, Functions, and Classification
Proteins
Amino Acids
The hydrolysis of protein molecules releases amino acids, whose union forms polypeptide chains. Amino acids have an amino group (-NH2) and a carboxyl group (-COOH).
Properties of Amino Acids:
- Amphoteric character: They behave as an acid or base depending on the pH. If the carboxyl group has an acidic character, it releases H+; if the amino group has a basic character, it accepts H+.
- Stereoisomerism: Since the alpha carbon is asymmetric, it forms stereoisomers. Two forms are considered: