Question

In species with cortical folds, the outer regions of the folds are called ________ and the inner grooves are called ________?

1) Gyri; Sulci
2) Sulci; Gyri
3) Fissures; Gyri
4) Gyri; Fissures

Answer 1

The outer regions of the folds in species with cortical folds are called gyri, and the inner grooves are called sulci, making the correct answer 1) Gyri; Sulci.

Step-by-step explanation:

In species with cortical folds such as the human brain, the outer regions of the folds are called gyri (singular: gyrus), and the inner grooves are called sulci (singular: sulcus). Therefore, the correct answer to 'In species with cortical folds, the outer regions of the folds are called ________ and the inner grooves are called ________?' is 1) Gyri; Sulci. The cerebral cortex is marked by these distinctive gyri and sulci which are important landmarks that allow us to separate the brain into different functional centers. A deep sulcus, such as the longitudinal fissure, separates the brain into two hemispheres: the left hemisphere and the right hemisphere. Additionally, the folding of the cortex is significant as it maximizes the amount of gray matter within the cranial cavity.